conhost crashes AKA cmd windows disappear

If your cmd windows keep disappearing when using a Win32 version of git, or some configure scripts, this MS KB article is for you: The conhost.exe process crashes when an application exits on Windows 7 or Windows Server 2008 R2 (KB2458000).

BTW, requesting hotfixes by email works fully automated, so you'll have the download link a few minutes later.